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3 years ago

1.

Chemistry

1 answer:

juin [17]3 years ago

7 0

The balanced reaction is

(Na3PO4)12H2O + 9(BaCl2)2H2O → 6Ba3(PO4)2 + 36NaCl + 10H2O

molar mass of (Na3PO4)12H2O = 380 g/mol

given mass of (Na3PO4)12H2O = 0.990 g

moles of (Na3PO4)12H2O = given mass/molar mass

moles of (Na3PO4)12H2O = 0.990/380= 0.0026 mole

one mole of (Na3PO4)12H2O forms 6 mole of Ba3(PO4)2

0.0026 mole of (Na3PO4)12H2O forms 0.0026×6 =

<em><u>0.0156 mole of Ba3(PO4)2</u></em>

mass of 0.0156 moles of Ba3(PO4)2 is = 0.0156 × 601.9 g = 9.40 gram

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Question 1 (2 points)

allochka39001 [22]

The solution to the polynomial expression since the power of the variable is in the second degree is 6.29 × 10² cm

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The power of a variable refers to the exponent of the variable and the highest power of a variable is the degree to which the variable is being raised. From the information given, the highest power of the variable is a polynomial.

Given that:

$\mathbf{= 2.150 \times 10^2 \ cm + 7.34 \times 10^2 \ cm - 3.2 \times 10^2 \ cm }$

So, since the exponents are in the same power we are going to add them all together multiplied by their exponent.

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$\mathbf{= (2.150 + 7.34 - 3.2) \times 10^2\ cm }$

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Vikentia [17]

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3 years ago

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kari74 [83]

Answer:

Physical properties

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Explanation:

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aleksandrvk [35]

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Explanation:

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